拉伸试验准应变速率控制法  

Quasi-Strain Control Method of Tensile Test

作　　者：苏英群[1] 

机构地区：[1]天津钢管集团股份有限公司,天津300301

出　　处：《工程与试验》2011年第B12期18-20,59,共4页Engineering and Test

摘　　要：为了满足GB/T 228.1-2010方法A对拉伸速度的要求,提出了一种准应变速率控制方法,即用全程位移自动控制间接实现对试样的应变速率控制,它考虑了系统柔度。无论测试何种材料、何种尺寸试样,仅需输入试样尺寸、估计的弹性模量和屈服强度,程序会自动计算出系统柔度和各阶段拉伸速度,对整个试验进行自动控制,使不同试验机做出的试验结果真正具有可比性。A quasi-strain control method is provided in this article to fulfill the requirements of method A in GB/T 228.1-2010.It adopts automatic displacement control in all phases instead of strain control and provides an indirect strain control method,inasmuch as the compliance of testing system is considered.No matter what kinds of materials and specimen are tested,it only needs to input the specimen dimension and the estimated elastic modulus and yield strength.The test software will automatically calculate the system compliance and the test speed of the every testing phase to control the test automatically.This method will actually realize the comparability of test results from different test machines.

关 键 词：拉伸试验 系统柔度 准应变 全程位移自动控制 

分 类 号：TB302.1[一般工业技术—材料科学与工程]